According to sources, the 23-year-old brunette and pop star, 21, had real chemistry and were seen hugging and kissing each other goodbye before she returned later on in the night.

A source told The Sun on Sunday newspaper: "Sara left at 11am dressed exactly the same. Then Harry walked out at 11.15am with his hair up in a bun on his head. It looked like he'd been partying pretty hard."

Let's find out more about Sara..

1. She's a VS Angel

Victoria's Secret newest Angel - Sara Sampaio (Photo: Getty Images)

The stunner was named as one of 10 new Victoria’s Secret Angels earlier this year and she also flaunts her amazing figure for Italian underwear brand Calzedonia.

2. She a surfer girl

Most of her photographs on Instagram are taken at the beach and one shot shows her at a surfing event. She's just too cool.

3. She's a brown belt in karate

Nobody better mess with this beauty because she knows how to handle herself. Watch out Hazza!

4. She's a dog lover

5. She's making Portugal proud

Sara was the first Portuguese model to land herself on the pages of Sports Illustrated's annual Swimsuit Edition and her career is going from strength to strength. And she's only 23!

6. She looks amazing without makeup

Not only does she eat pancakes for breakfast and still look like a supermodel, she has flawless skin and doesn't really need to wear any slap. It's just unfair, really.

7. She likes getting naked

Plenty of snaps on her social media accounts show her in the buff, sprawling on the sand and even kneeling down near some happy penguins.

8. She's learning to play guitar

Sara can already play violin after taking lessons when she was a child. And now she's been picking up some guitar tips too. At this rate she'll be joining One Direction.